/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.huizhonglm.diap.core.zxing.decoding;

import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.huizhonglm.diap.R;
import com.huizhonglm.diap.core.zxing.CaptureActivity;
import com.huizhonglm.diap.core.zxing.camera.CameraManager;
import com.huizhonglm.diap.core.zxing.camera.PlanarYUVLuminanceSource;

import java.util.Hashtable;

final class DecodeHandler extends Handler {

    private static final String TAG = DecodeHandler.class.getSimpleName();

    private final CaptureActivity activity;
    private final MultiFormatReader multiFormatReader;

    DecodeHandler(CaptureActivity activity,
                  Hashtable<DecodeHintType, Object> hints) {
        multiFormatReader = new MultiFormatReader();
        multiFormatReader.setHints(hints);
        this.activity = activity;
    }

    @Override
    public void handleMessage(Message message) {
        switch (message.what) {
            case R.id.decode:
                decode((byte[]) message.obj, message.arg1, message.arg2);
                break;
            case R.id.quit:
                Looper.myLooper().quit();
                break;
        }
    }

    /**
     * Decode the data within the viewfinder rectangle, and time how long it
     * took. For efficiency, reuse the same reader objects from one decode to
     * the next.
     *
     * @param data   The YUV preview frame.
     * @param width  The width of the preview frame.
     * @param height The height of the preview frame.
     */
    // private void decode(byte[] data, int width, int height) {
    // long start = System.currentTimeMillis();
    // Result rawResult = null;
    // PlanarYUVLuminanceSource source =
    // CameraManager.get().buildLuminanceSource(data, width, height);
    // BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    // try {
    // rawResult = multiFormatReader.decodeWithState(bitmap);
    // } catch (ReaderException re) {
    // // continue
    // } finally {
    // multiFormatReader.reset();
    // }
    //
    // if (rawResult != null) {
    // long end = System.currentTimeMillis();
    // Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n" +
    // rawResult.toString());
    // Message message = Message.obtain(activity.getHandler(),
    // R.id.decode_succeeded, rawResult);
    // Bundle bundle = new Bundle();
    // bundle.putParcelable(DecodeThread.BARCODE_BITMAP,
    // source.renderCroppedGreyscaleBitmap());
    // message.setData(bundle);
    // //Log.d(TAG, "Sending decode succeeded message...");
    // message.sendToTarget();
    // } else {
    // Message message = Message.obtain(activity.getHandler(),
    // R.id.decode_failed);
    // message.sendToTarget();
    // }
    // }
    private void decode(byte[] data, int width, int height) {
        try {
            long start = System.currentTimeMillis();
            Result rawResult = null;
            // modify here
            byte[] rotatedData = new byte[data.length];
            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++)
                    rotatedData[x * height + height - y - 1] = data[x + y * width];
            }
            int tmp = width; // Here we are swapping, that's the difference to #11
            width = height;
            height = tmp;
            PlanarYUVLuminanceSource source = CameraManager.get()
                    .buildLuminanceSource(rotatedData, width, height);
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
            try {
                rawResult = multiFormatReader.decodeWithState(bitmap);
            } catch (ReaderException re) {
                // continue
            } finally {
                multiFormatReader.reset();
            }
            if (rawResult != null) {
                long end = System.currentTimeMillis();
                Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n"
                        + rawResult.toString());
                Message message = Message.obtain(activity.getHandler(),
                        R.id.decode_succeeded, rawResult);
                Bundle bundle = new Bundle();
                bundle.putParcelable(DecodeThread.BARCODE_BITMAP,
                        source.renderCroppedGreyscaleBitmap());
                message.setData(bundle);
                // Log.d(TAG, "Sending decode succeeded message...");
                message.sendToTarget();
            } else {
                Message message = Message.obtain(activity.getHandler(),
                        R.id.decode_failed);
                message.sendToTarget();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}
